Heater



B. H. MEISTER.

HEATER.

FILED JULY 13. 1920.

2 SHEETS S'HEET l.

WITNESS ATTORNEYS Mar. 6, 1923.

B. H. LEISTER.

HEATER.

FILED JULY 13, 1920.

2 SHEETS-SHEET 2.

I "l A u "un-aia,

WITNESS IATTORNEYS Patented ar. 6, 1923..

BENJ'AJlIIN H.` LEISTER, 0F SAN FRANCISCO, CALIFORNIA.

HEATER.

v Application led July 13,

To all whom t may concern:

Be it known that I, BENJAMIN rLnIs'rnn, a citizen of the .United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Heaters,of which the following is a specification.

The present invention relates to improvei stantially oval in cross section and coiled to positionV the relatively flat surfaces in substantially parallel relation affording alternating fluid andheat passages throughout the length of the coil. 1

. A further object is to provide a coiled tubular construction, between adjacent coils of which are positioned spacer members providing heat passages transversely of and between the coiled surfaces for approximately thefull width of the tubes.

Another objectV of the invention is [to provide a coil structure of the flattened tubular type with means at the end of the coil substantially: circular in `cross section affording.l a strengthening and holding means for the coil structure.

'A further object is to provide a heater of the coil type wherein arcore is provided about which the fluid channel forming tube is` coiled in convolute form, and wherein spacer members secured'to one surfaceof the tube are adapted to unite to adjacent surfaces of the tube forming convolute affording the spacers and heat channels between adjacent convolute forming coils.

A still further object is to provide a means whereby adjacent convolute structures communicate vwith each other throughjtheir supporting cores and wherein adjacent convolute structures are separable from their cooperating structures, and whereby a fluid passage is provided in opposite directions in adjacentcoacting convolute structures.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated inthe ac- 1920. seriai No. 395,978.

companying drawings, and set forth in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

To more fully comprehend the invention reference is directed to the accompanying drawings, wherein- Figure l is a view in side elevation partly in longitudinal section of a heater or furnace vcontaining the preferred embodiment of my invention.

Figure 2 is a diagrammatic broken plan view.4 of one of the convolute forming heaters.

Figure 3 is a sectional view taken on line 75 3-3 of Figure 2, viewed in the direction of the arrow.

Figure 4 is a central sectional view of the mounting core for adjacent convolutes.

Figure 5 is a detail sectional view of the helizi forming coil illustrated in Figure l of the drawings.,

In the drawings wherein lile characters of" reference designate corresponding parts,

l indicates a furnace constructed of any suitable size uand configuration provided with a chamber 2 surrounded by an insulatingwall 3, and at one` end formed with an opening 4 through which is adapted to project a heating element 5 of any suitable 90 type. The products of combustion are adapted to pass from the chamber 2 through the stack 6 and a forced draft passage 7 surrounds the insulating wall 3 and con` nects with the opening 4: through the stack 6 whereby, if desirable, a forced draft may b e had between the stacks 6 and the chamber 2. `The closure plate or door 8 is adapted for positioning over the `opening 4, and is provided with a port through which the heating element 5 extends. While the construction is illustrated in Figure l of the drawingsas being disposed in horizontal position, it will be readily apparent that the same may be vertically disposed.

Within the chamber 2 is provided a suitable heater, one portion of which is in the form of a tube 9 rolled to provide relatively flat side walls 10 affording a substantially oval fluid passage 11 on its interior. The tube is coiled uniformly throughout its length to provide a helix 12 disposed with the flat walls 10 of adjacent coils forming the helix lying relatively close to each other as in Figure 1 of' the drawings, and connected throughout the lengt-h of thehelix by the spacers 13 which extend the full width of the faces 10 affording heat passages disposed radially of the helix and further providing uniting means between adjacent coils ofthe helix to retain said coils in fixed positionv relatively to each other at spaced-inter'vals throughout the entire circumference of saidv helix. The coils of the tube at the terminal ends of the helix are substantially circularin cross section as at 1/1 providing stiffening or strengthening means and affording an easy coupling connection Vbetween the ends of the helix and tubular members connected therewith. At the end of the helix structure 12 removed from the member 5, I prefer to position a series of convolute tubular structures partly illustratk' ed in Figures 2, 3 and 4 of the drawings, landthe same are constructed 1n the followmembers 18 and 19 together.

ing manner: Theronvolute structures, illuscontact with ad'acent surfaces of succeedinfy D coils, and are united therewith in any suitable manner as by welding. A core 17 is providedfor each pair or battery of convolute structures and the sameconsists of the parts 18 and 19 formedwith a convolute peripheral surface provided with transverse slots `20 forming spaced transversely disposed spacer members 21 disposed radially of the surface of the members 18 and 19. The members 18 and 19 are each provided on their interior with the fluid passage 22, said passage opening as at 23 adjacent the periphery 4of' the members `and communicate with each other preferably on the center of the members as at 24. One ofthe members, preferably the member 18, is provided with a threaded stud 25 adapted for inserting in and projecting through the stud receiving opening 26 in the member 19, and said stud 25 is adapted for receiving a nut 27 for threading thereonto detachably secure said To afford a fluid tight joint between and adjacent contacting surfaces of the members 18 and 19, I provide an annular fiange 28 on one of the j members, which is receivable in an annular a recess 29 formed on one face of the other member, said flange 28 and recess 29 being provided with coacting bevelled surfaces 30 which are adapted to be wedged together on the adjustment of' the nut 27 on the stud 25. To holdthe'respective members 18 and 19 during the coiling of the convolute tubular structure about the same, I provide a countersink 31 in each of said members, said countersink being illustrated as polygonal in plan. a

In forn'iin'g the convolute structures, one end of the tube 15 secured to the outlet 23 of the channel 22 of oneof the sectionsofthe tube iscoiled, as in Figure v2 of the drawings, about said core with successive coils forming the convolute structure contactingv with the free ends of the spacer 16 carried on the tube surface, `until the convolute structure of the desired size is provided, after which time the free ends of the spacer l16 are welded or otherwise secured to the adjacent portions of succeeding coil surfaces whereby the coils forming the convolute are held in fixed relation relative to'each'other, and heat passages are provided transversely of the coil surface for approximately their full width,

nal end from the plane of theI remainder of the coil-as at82, whichoffset end is preferably threaded providinga means lfor coupling the end ofthe convolute to an adjacent convolute.

It will be apparent that by "providing a two` part, separable core, each` part mounting a. convolute tubular structnreyas above described, adjacent' convolutes may bev separately formed and subsequently positioned with their adjacent edges in relatively close relation, and when desired maybe detached to enable the repairing of the convolutes if the same is necessary.

1. A heater-comprising a tube providing a fluid chamber arranged in convolute form, and a single series of spacers 'separating adjacent -convolutes ofthe tube and uniting the same one to the other to' provide heat passages between .saidv adjacent convolutes of the tube, said spacers secured atone endto one face of the tube and contacting at their free ends with lthe adj acent face of an adj acent convolution permitting lthe expansion and contraction of the convolute.

'2. A heater comprising a tube pro-l adjacent coils of the convolute, the outer coil of the convolute being secured to its inner adjacent convolute to prevent unwinding of said structure.

3. A heater comprising a pair of tubes coiled to provide a pair of convolute structures disposed one adjacent the other, a core about which each of said convolutes is coiled, said core consisting of a plurality of parts each provided with a Huid channel one communicating with the other and eachchannel opening at the peripheryof the core and connecting with the inner end of one of said convolutes, and means for detachably se curing said channeled core members together.

d. A heater comprising a pair of tubes coiled to provide a pair of convolute structures, the walls ofadjacent convolutions lying in spaced relation to said convolute structures being disposed side by side in parallel spaced relation, spacers separating adjacent coils of the respective convolutions and uniting the same one to the other to provide heat passages between adjacent coiled surfaces of the respective structures, a core yabout which said structures are wound, the same consisting of a two part member provided with a channel affording a communication from one convolute structure to the other, and means for detachably securing said core structure parts together.

5. A heater comprising a tube providing a chamber oval in cross section and coiled in convolute form with adjacent surfaces in spaced relation, spacers separating the overlying surface of the convolutions and for uniting the same to fix one convolution relative to the other and to provideheat passages adjacent separated convolutions, the outer convolution being substantially circular in cross section and odset at its terminal end from the main body of the convolutions.

6. A heater comprising a core having a volute peripheral surface provided with a plurality of spaced radial projections and formed on its interior with a fluid channel, a tube providing a fluid channel disposed with one end connecting with one end of said channel, spacer members secured to one face of said tube, said tube coiled about said core to form a convolute structure with the free edges of said spacers vcontacting with the surface of the adjacent coil providing means for separating the coils of the convolute, and forming heat passages extending transversely of said coils.

7. A heater comprising a core provided on its edge with a plurality of radial spacer projections forming a volute periphery near said core, said core further provided with a channel opening at one end on the edge of said core, a tube of oval cross section providing a Huid channel and disposed with one end communicating with the end of said channel at its edge opening, spacer members secured to one exterior face of said tube, said tube being coiled about said core with the free edges of said spacers contacting with the surfaces of the adjacent coil providino a convolute structure with separated convotlute forming coils, said spacers providing means for fixing the coils one relatively to the other and providing heat passages` extending transversely of said spaced coils for approximately their full width.

8. A heater comprising a core having a transversely serrated volute peripheral surface and formed on its interior with a chan- `nel opening a-t its centerand at its peripheral surface, a tube connected at one end with the peripheral opening of said channel and coiled about said core providing a volute structure, spacer members extending transversely of the tube between said volute forming coils providing heat passages disposed transversely of the coils and extending approximately the full 'width thereof, and said core being provided with a countersink aording means for holdingthe same during the coiling of the tube about the same.

9. A heater comprising a pair of convolute tubular coils` disposed side by side in spaced relation, a two part core on to which the inner ends of said convolute forming tubes are secured, said core consisting of separable sections each provided with a fluid channel communicating with each other, and each opening through the periphery of their respective section providing connection between the respective convolutes and the core, one of said sections provided with a stud, the other section being provided with an opening for receiving said stud, a nut for securing to said stud to detachably secure said sections together, said sections being further provided with a countersink affording means for holding the same during the ceiling of the tubes about the same.

l0. A heater comprising a tube providing a iiuid chamber arranged in convolute form, standards secured to one face ofthe tube and contacting at `their free ends with an opposite face of the tube providing heat passages between `said adjacent convolutes of the ltube and permitting the expansion andv contractionfof the convolute on the same being subjected to different temperatures, the outer coil of said convolute being cylindrical in cross section.

ln testimony whereof have signed my name to this specication.

BENJAMIN n. yLnrsfrnn. 

